200 Ohio State Academy of Science 



from which measurements could be made, and scarcely anything 

 visible within two miles whose location is given on any chart or 

 map. The plat in the auditor's office was found to be in error 

 to the extent of forty-five rods. No detailed and accurate map 

 of the region exists to this day. In the work done the first 

 winter the importance of careful location of the holes with ref- 

 erence to points on shore was not realized, their location with 

 reference to other holes sufficing to show — what was not pre- 

 viously known — that it was possible to trace these submerged 

 valleys. Sometimes in tracing a valley it became desirable to 

 test the bottom a short distance to one side of the line we had 

 been following. Accordingly we measured off 16 rods or some 

 other distance at what seemed to be a right angle to the main 

 line and on making a hole there decided to go farther in the same 

 direction. The deviation from the direction intended was usu- 

 ally discovered in some way either before or at the time of 

 platting the work on the charts, even though it required a jour- 

 ney of several miles the next day to reach the spot again and 

 trace the angles on paper. The location of borings shown on 

 Map III, with the exception of those enclosed in parenthesis, are 

 believed to be correct within ten rods or a little more, most of 

 them much nearer than this. With reference to other borings 

 in the vicinity the error in the location is very small, if made the 

 same winter. 



Nearly a hundred boys have assisted in this work and in 

 determining the age and height of the aqueous deposits in the 

 ridges on Cedar Point, some of them many times. Altho serv- 

 ing without pay, often in bad weather and enduring fatigue they 

 have made no complaint. I wish there were space to mention 

 their names. On one occasion a boat was taken along on the 

 ice, at another time a life preserver. Both proved useful. Twice 

 at least the shore has not been reached until after dark and on 

 one of these occasions there were some anxious parents. Many 

 mittens have been lost or discarded and many tools, large or 

 small, gone to the bottom of the bay or farther, but no lives have 

 been lost or limbs broken. Feet have been wet and sometimes 

 more, but few colds have been taken and many probably avoided 

 or cured by the vigorous outdoor exercise. 



I am indebted to Mr. August Klotz who has generously put 

 at my disposal without charge the resources of his machine shop^ 

 and to Charles Judson, C. E., who has often loaned me his. 

 instruments and assisted in other wavs. 



